Nitrogen gas consists of: a. two separate nitrogen atoms b. a diatomic nitrogen atom c. a molecule of two nitrogen atoms d. a compound of nitrogen atoms

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes

There are only about 250,000 known fossil species. true or false

Aremote community desperately needs more electrical energy. it is located in an area with the following characteristics: average wind speed of 15 – 20 km/hr some medium-sized rivers with slow-moving currents few coal deposits some oil exploration being conducted within 400 miles based on the above information, which energy source would be the most economical and safest for the community to pursue? a. fossil fuel b. hydroelectric c. nuclear d. wind